Superfund Tax on Chemical Substances; Request To Modify List of Taxable Substances; Notice of Filing for Styrene Isoprene Block Copolymer; x+z=482, y=2,178.51, a=1.70
By Treasury Department, Internal Revenue Service · Sep 30, 2026, 11:00 PM CDT
This notice of filing announces that a petition has been filed requesting that styrene isoprene block copolymer ((C<INF>8</INF>H<INF>8</INF>)<INF>x</INF>- (C<INF>5</INF>H<INF>8</INF>)<INF>y</INF>- (C<INF>8</INF>H<INF>8</INF>)<INF>z</INF>- (C<INF>33</INF>H<INF>56</INF>N<INF>4</INF>OS<INF>2</INF>)<INF>a</INF>; x+z=482, y=2,178.51, a=1.70), also known as "SIS Rubber," be added to the list of taxable
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Layer 1 · Claims & fact checks
AI analysisLayer 3 · Reporting analysis
AI analysisNeutral factual statementThe sentence states the existence of a petition without editorializing.
ClarificationExplicitly separates the filing from any regulatory decision, reducing potential misinterpretation.
Context
AI analysisMissing context
The notice does not explain which agency is responsible for the Superfund tax, the legal criteria for adding substances to the taxable list, the potential financial impact of taxing SIS Rubber, or the timeline for public comment and decision-making.
Important context
The filing is an official procedural step that initiates a public comment period; it does not itself change tax policy. The chemical formula and variable values are provided to precisely identify the substance under consideration.
Opinion vs. reporting
AI analysisThe document is purely factual reporting of a petition filing and does not contain opinion or analysis.